They're not going to die, but they are definitely on a big decline. This looks OK though, the Deadpool movies are honestly more action-comedies than they are "superhero movies" anyway. 

Part of the decline is genre fatigue, but a bigger part may have been disappointing new entries like Thor: Love and Thunder, Doctor Strange in The Multiverse of Madness, and I haven't seen The Marvels to have an opinion of it but it's box office was abysmal for an MCU movie.

Superhero movies are obviously thriving.

Why does this feel like something they'd actually have in the MCU as a throwaway gag?

I enjoyed watching the first 2 Deadpool movies a lot! Can't wait to see this one!

Havent seen the first two movies but planning to do so soon.

Excited for this though regardless.

Yeah, I know. There's too much money at stake.  But, I would be delighted to see them have a decline over the next 6 years or so. 

Just in time to make a comeback around 2030, with new actors and storylines.

The mid-tier heroes and factions will die out.

(i.e. Eternals, Ms Marvel, She-Hulk, Aquaman, etc).

You'll be getting the usual X-Men, Fantastic Four, Batman, Super Man and Spider-Man movies lol

Which means nothing to me. I won't be watching any of that crap.  Christopher Reeve was the best Superman. Christian Bale was the best Batman.

I see no one eclipsing their performances now or in the future.  Hollywood can kiss my ass.

I don't care if superhero movies are on or off a decline, I just care about if the next one i want to watch looks good. Deadpool looks good